MEX-XB100BT - Sony Car Audio Service Manual (repair manual). Page 20

To capture your voice during handsfree calling, you 
need to install the microphone ʚ.

ˎ It is extremely dangerous if the cord becomes 

wound around the steering column or gearstick. 
Be sure to keep it and other parts from interfering 
with your driving operations.

ˎ If airbags or any other shock-absorbing 

equipment is in your car, contact the store where 
you purchased this unit, or the car dealer, before 
installation.

Note
Before attaching the double-sided tape ʛ, clean the 
surface of the dashboard with a dry cloth.

1

To enable the wired remote control, set 
[SET STR CONTROL] in [SET STEERING] to 
[EXTERNAL] (page 17).

Installing the microphone 

Using the wired remote control

ʛ

ʚ

Clip (not supplied)

ʚ

.

Subwoofer Easy Connection

You can use a subwoofer without a power amplifier 
when it is connected to a rear speaker cord.

ˎ Preparation of the rear speaker cords is required.

ˎ Use a subwoofer with an impedance of 4 to 8 ohms, 

and with adequate power handling capacities to 
avoid damage.

Memory hold connection

When the yellow power supply lead is connected, 
power will always be supplied to the memory 
circuit even when the ignition switch is turned off.

Front speaker

Subwoofer

Speaker connection

ˎ Before connecting the speakers, turn the unit off.

ˎ Use speakers with an impedance of 4 to 8 ohms, 

and with adequate power handling capacities to 
avoid damage.

After matching the connections and switching 
power supply leads correctly, connect the unit to 
the car’s power supply. If you have any questions 
and problems connecting your unit that are not 
covered in this manual, consult the car dealer.

12

continuous power 
supply

Yellow

15

switched power supply

Red

12

switched power supply  Yellow

15

continuous power 
supply

Red

Red

Red

Yellow

Yellow

Red

Red

Yellow

Yellow

Red

Red

Yellow

Yellow

Make sure your car’s auxiliary power connector, and 
match the connections of cords correctly 
depending on the car.

Power connection diagram

Auxiliary power connector

Installation

Before installing the unit, remove the protection 
collar ͨ and the bracket ʓ from the unit.

1

Pinch both edges of the protection collar 

ͨ, then pull it out.

2

Insert both release keys ͧ until they 
click, and pull down the bracket ʓ, then 
pull up the unit to separate.

Removing the protection collar and the 
bracket

ͨ

ʓ

†

ͧ

Face the hook inwards.

2

Mount the unit onto the bracket ʓ, then 
attach the protection collar ͨ.

ʓ

ͨ

ͩ

ͪ

Before installing, make sure the catches on both 
sides of the bracket ʓ are bent inwards 2 mm (

3

/

32

 

in).

1

Position the bracket ʓ inside the 
dashboard, then bend the claws outward 
for a tight fit.

Mounting the unit in the dashboard

ʓ

182 mm (7 

1

/

4

 in)

53 mm (2 

1

/

8

 in)

Catch

When replacing the fuse, be sure to use one 
matching the amperage rating stated on the 
original fuse. If the fuse blows, check the power 
connection and replace the fuse. If the fuse blows 
again after replacement, there may be an internal 
malfunction. In such a case, consult your nearest 
Sony dealer.

Note
Use an appropriate tool to replace a fuse.

Fuse replacement

Fuse (15 A)

ˎ If the catches are straight or bent outwards, the unit 

will not be installed securely and may spring out.

ˎ Make sure the 4 catches on the protection collar ͨ 

are properly engaged in the slots of the unit.

Do not touch the left side of the unit when 
removing from the dashboard. The heatsink on 
the left side of the unit remains hot right after 
use.